Loom beat-up mechanism



L L E W M H s w D LOOM BEAT-UP MECHANI SM 2 Sheets-Sheet 1 Filed Aug. 20, 1946 y 1 D. w. SHIMWELL 2,471,354

LOOM BEAT-UP MECHANISM Filed Aug. 20, 1946 I 2 sheets-sheet 2 Patented May 24, 1949 LOOMBEATJ-UP MECHANISM.

DerrickWalter Shimwell', Rowsley; England ApplicationAugnstZO, 1946;Serial No. v 691,746; ImGreatBritain August-21, 1945 of the loom cycle being taken upby the flight of the shuttle:sohthatspeeding uprof the loom does not involve speeding up of the shuttle.

The invention comprises means which impart atcombined upward-and rearward swinging movement to-thereedfrom the beat-upposition so enablingwthe shuttle-toenterthe-warp shed at an early point irr theloom cycle after beat-up.

Thea-inventionfurther comprises the arrange ment in which thereed hasia straight upper portion with a curved lower, portion which passes.

with-acircular descendingmotion behind theshuttle track at the-end of its rearward motion;

In one arrangement in accordance with my invention, the reed is carried between links, one at each side of the loom, each link being pivoted at one end to a slide guided in a path substantially parallel to the upper row of warp threads in the shed, and at the other end to a lever pivotally carried at an intermediate point by a pivoted support turning about a fixed point, the other end of the lever being coupled to an arm which is oscillated about a fixed point by a crank pin.

The connection of the reed to the links before referred to is to an intermediate point of the links so that relative vertical movements of the ends of the links cause a raising or lowering of the reed whilst the oscillatory movements due to the cranks gives the links and so the reed backward and forward movements.

It will be appreciated that the movements of K the reed will be quickest when the links are moving into and out of line and my arrangement ensures that the links and levers are moving angularly or out of line after beat-up is completed and the reed is being brought behind the shuttle path. The in-line disposition of the links and levers is at beat-up. As the reed recedes from the beatup position, the levers turn about their pivotal supports and raise the ends of the links between which the reed is carried, which ensures the desired rapid rate of rearward movement of the links and imparts an upward and a turning movement to the reed towards the healds. Then as the crank passes towards and around back dead centre, there is a lowering circular movement of the reed which is kept behind the shuttle path for an extended period whilst the crank moves round its back dead centre position.

Referring to the accompanying explanatory diagrams:

Bil -191 2? Figure 1 is a general view ofthebeat upmech anism with the "reed behind the shuttle track;

Figure 2"shows*'the mechan'ismin the b'eat up position of the reed.

Figures- 3 arrd-"4- show thevreedinits "rearmost position and exemplifiesihow'the reeds position" isrelatively; unaltered for a considerable angular movementof the crankwhich-operates-thebeat up mechanism.

Figure 5 sh'ows'a-modified form of reed? It" will be appreciatedthat'a mechanism similar tothat" diagrammatically illustrated is situated at" each opposite 'sideof the loom:

The reed, aiscarried'at its opposite endsbetween links b; one end of each linkbeing con nected-to a slide-c'whicl'rmoves in. a slot d) which is substantially parallel with the upper row 'e'- of the warp threads. The other end of each link b is pivoted to one end of a lever which turns about the end of an arm g having a fixed fulcrum point it. The other end of each lever f is pivoted to a lever i which turns about a fixed fulcrum 7' and is oscillated by a link k coupled to a crank arm m.

It will be noted from Figure 2 that when the reed is in the beat-up position, the links b and the levers f and i are substantially in line. When said links and levers are moving towards and away from the in-line or beat-up position, the movement of the reed is the most rapid relatively to the angular movement of the crank arm m. Contrariwise, when the links b and levers f and i are at a considerable angle to one another as shown in Figures 1, 3 and 4, the movement of the reed it away from and towards the beat-up position is a minimum for a considerable angle of movement of the crank arm m. If a comparison be made between the angular positions of the crank arms m in Figures 1, 3 and 4 and the position of the reed a. in such figures, it will be seen that whilst the reed has had a certain angular movement in Figure l relatively to Figures 3 and 4, the reed is substantially in the same position relatively to the beat-up position.

As the reed a recedes from the beat-up position shown in Figure 2, the levers f and i turn about their pivotal supports with the result that the end of the link b connected to the lever f is raised as the link b is drawn backwards with the result that the reed a is both raised and drawn backwards from the beat-up position towards the healds 0. As the crank arm m continues its movement, there is a lowering circular movement of the reed behind the shuttle track and then as the shuttle passes through the warp shed,

the reed continues its circular movement without advancing to the beat-up position, and then as the shuttle leaves the shed, the reed a. advances to the Figure 2 or beat-up position.

It follows that the reed is kept behind the shuttle path for an extended period of time, whilst the crank arm moves round its back dead centre position. This gives an extended period of time for the shuttle to pass through the warp shed.

The reed a has a straight top part which is at or substantially at right angles to the links I) and beat-up takes place upon this straight part of the reed. The reed is then curved away from the shuttle track, i. e. concave to the shuttle, so that the pivotal movement of the links supporting the reed at the back or rearmost position merely involves a circular movement of the reed around the shuttle and not an advance into the shuttle path. The curved part of the reed enables the latter to go back beyond the shuttle path before the straight part and enables the shuttle to enter the shed earlier than it otherwise could.

In some cases the beat-up may be advantageously efiected in the crook or hollow between two parts of the reed angularly disposed to one another as shown in Figure 5.

By a combination of the raising and lowering movements of the reed with the circular or turning movements as the reed goes backwards and forwards, I obtain a rapid withdrawal of the reed to behind the shuttle path, with a considerable dwell in the back position and a rapid advance and lowering of the reed to efiect beat-up.

Havin now particularly described and ascertained the nature of my said invention, and in What manner the same is to be performed, I declare that what I claim is:

A beat-up mechanism for a narrow ware loom, comprising a reed having a straight top part and a. lower part the end of which extends at an angle to the top part, a link at each side of the loom, said link carrying the reed, means for guiding one end of each link in a path substantially parallel to the upper row of warp threads in the shed, a lever pivoted at one end to the other end of each link, a pivotal support, turning about a fixed point, for an intermediate point of said lever, a second lever pivoted to the other end of said lever at one end and turning about a fixed point at its other end, and a crank pin connected with said second lever, the arrangement being such that the link and levers are substantially in line at the beat-up position of the reed, and the reed has a substantially circular movement while the crank pin moves through a considerable are about its back dead centre position relatively to the second lever.

DERRICK WALTER SHIMWELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,030,575 Farnsworth June 25, 1912 1,222,524 Chernack Apr. 10, 1917 1,659,275 Lucas Feb. 14, 1928 1,747,722 Lucas Feb. 18, 1930 2,382,511 Shimwell Aug. 14, 1945 FOREIGN PATENTS Number Country Date 286,080 Germany July 20, 1915 

